Program Password dan username pada MinGw

#include <stdio.h>
#include <string.h>
int main()
{
char Pass[25];
char user[255];
int a = 'y'||'n';
ulang:

printf ("\n ^^^^^^^^^^^^ Welcome to Facebook ^^^^^^^^^^^^ \n");
printf("\n");
printf("Masukkan User Name \t: ");scanf("%s",user);
printf("Masukkan Password \t: ");scanf("%s",Pass);
if ((strcmp(Pass, "3saudara")==0)&&(strcmp(user,"Bella")==0))
printf("\n^^^^^^^^^^^ Welcome to Facebook ^^^^^^^^^^^^^");

else
printf("\n Warning ! Password and User Name invalid !");

}